Updates to website with HTML coding + SEO developments

General information for the website: Social rewards website
Kind of development: Customization of existing website
Description of requirements/features: We are looking for a website developer to add extra pages and features to our webpage including integrating our blog page to be apart of the mother webpage, login system, sign up pages.
We need SEO added and developed.
Integrated to social media of users.
Good tracking and statistical data gathering system.
Integrate to social media.
We are developing an app so we need website to integrate seamlessly so user can move from app to website.
(We want to eventually have amazon hosting so coding towards this is preferable so we have a good translation.)
API Integration Required: Social Media
Extra notes: